Sigma Sector is not the only place where you can get Arche Tuning XP in The First Descendant, but it is an often overlooked fact.
Source: N4G PC The First Descendant Players Share a Reminder – You Can Farm Arche Tuning XP From Various Missions
Sigma Sector is not the only place where you can get Arche Tuning XP in The First Descendant, but it is an often overlooked fact.
Source: N4G PC The First Descendant Players Share a Reminder – You Can Farm Arche Tuning XP From Various Missions